Jeffrey Epstein in custody in West Palm Beach, Fla., on July 30, 2008 Photo: AP

Billionaire Jeffrey Epstein completed his 13-month prison term in 2009 for soliciting a minor for prostitution — but he keeps a jarring reminder of his time behind bars in his $50 million Upper East Side home.

“He has a sumptuous mansion filled with fine art and antiques, with all the luxury and grandeur fit for a prince,” said a source who’s visited the abode.

But the house includes a seemingly incongruous detail — a mural of a prison yard.

“It’s a mural on three sides of a large, walled terrace upstairs,” our source said, adding the wraparound image includes inmates in orange jumpsuits, guard towers and barbed wire.

The source said that Epstein once told guests: “I wanted to remind myself of where I’ve been . . . that’s part of my life that will never leave me.”

Meanwhile, two women who claim they were sexually abused by former Bill Clinton confidante Epstein are pushing to reopen his case amid allegations he got special treatment on a plea deal due to his wealth and connections.

A Florida court recently ruled the women may see documents discussing a plea bargain between Epstein’s lawyers and prosecutors.

Almost a decade ago, the FBI was probing allegations he abused underage girls. But the investigation was dropped and he pleaded guilty to a single state charge of soliciting prostitution in 2008.

His lawyer Roy Black has previously said the plea bargain “was no sweetheart deal by any stretch of the imagination.”